Improvement in machine for making chair-seats



dinard' tapes A wat limine;

JOSEPH C. MCOORMICK, OF SMIOKSBURG HIMSELF AND `GEORGE STITELER, OFSAMEPLACE.

Letters Patent No. 96,458,

dated November 2, 1869.

IMPROVEMENT IN MACHINE FOR MAKING` CHAIR-SEATS.

The Schedule referred to in these Letters Patent and making part f thesame.

f Figure 2 is a pian, one end of the machine having been broken away.

Figure 3, is a perspective view of one of the bits detached.

vThe object of this invention is to provide, for public use, a simple,convenient, and effective machine for cutting out and moulding curvedseats for common wooden chairs.

In the drawings- A indicates the frame; y

B, the platform or'table, supported by the frame;

C, the cutter-heini;

1),' the driving-gear, belts, Snc.;v E, the head or graduated rest atthe end of the table, in front ofthe cutter;

l, an elevated plaltbrm'a't the left side of the cutter, made removable,itpreierred; and

M M, the bits or cutters, fastened t the side of the 'cutter-head by apivot-screw or rivet, Ir, and a slof, s, and set-screw, s', iu-themanner clearly shown in tig. 1.

i\l y invention relates solely vto 'the construction of thecuttilig-instrument, and the arrangement of the same with relatiol tothe graduated head E, formed ofthe steps c, el, 2, &c., and placedtransversely across the table at right angles with the vertical plane ofthe cutter. f

The cutter-head is a cam-shaped disk, having four (more or less)projections, m m. m2 m3, arranged around its perimeter, as seen in tig.1,- with their left-hand edges bevelled olf.

lhe bits are attachedto the right-hand side of' these czun-slntped*projections, so that their cutting-edge projects beyond the abrupt orfront 'edge of the projections;

.By-setting the screws s' at diii'erent points along the slots s,- theinclination ot the bits to the axisof the disk U may be adjusted, atpleasure, so that the bits wili cutinto' the wood more or less rapidly.

'lhe cutting-end of each bit is scalloped out onv theA left side, so asto leave a sharp,I curved edge, a a a a, as shown in iig, 3.

In practical operation, the-machine works as fol` lows:

One edge ofthe plank that is to become a chairseat is rested upon oneofthe steps e c, &c., or upon the platform, in front of the lower step,and the op,

posite edge, heldin the workmans hand, is brought down until the hitsstrike the fiat side ot' the plank, and cut to a suticient depth intoit. The plank is then moved endwise a little, and'auother similar ont4is made alongside of and parallel to the first, and so onuntil it hasbeen scored in like manner from endA to end, when the wood between thecuts may easily be removed; or, if` preferred, in practical (nieration,the plank may be so gradually moved that thecutters will themselvesremove all the wood to the depth ot' their cut as they perform theirwork. not leave the plank cut out properly on that side, its positionmay be changed, by resting its edgeon a different step, (higher orlower, and nearer to or' further from the'cutter-head,) and again goingthrough the'process; and this may be repeated till the plank has becomeproperly'moulded on that side. It may then be turned, and moulded ontheopposite, until it has assumed the scroll-shaped form that adapts itto the oiiice it has to perform.

Having thus 'described my invention,

What I claim as new, and desire to secure by Let ters Patent, is

1. The bit, constructed in the form shown in tig. 3, having itscutting-edge scalloped out. on the left side, so as to leave a sharp,curved point, au, the rivethole 1', and transverse slot s, near thelwidened end of the bit, and opposite the cutting-point, substantially asdescribed. h v2. The rotating disk c, having the canrshaped projectionsm ml m2 m3,' with their lelt edges bevelled o,

in combination with the bit above claimed, substantially as described.

3. In connection with the cutter-head C, having the bits M, theiixedhead or rest E, having the steps c c e c, substantially as and forthe purposes described. To theabove specification ofmy invention, I havesigned my 11a-nd, this 17 th dayot'Jnne, 1869.

- J. C. BLIC-COR-MICK.v

Witnesses EDM. F..BnowN,

Unas. A. Partir.

, PENNSYLVANIA, ASSIGNOR T0 l,

1f this does

